Followup for git cl set-commit tests.

Based on review of https://codereview.chromium.org/1889483002.

R=sergiyb@chromium.org
BUG=599931

Review URL: https://codereview.chromium.org/1885963002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299905 0039d316-1c4b-4281-b951-d872f2087c98

tests/git_cl_test.py

@@ -1353,6 +1353,9 @@ class TestGitCl(TestCase):
         ((['SetReview', 'chromium-review.googlesource.com', 123,
            {'Commit-Queue': 1}],), ''),
     ]
+    # TODO(tandrii): consider testing just set-commit and set-commit --clear,
+    # but without copy-pasting tons of expectations, as modifying them later is
+    # super tedious.
     self.assertEqual(0, git_cl.main(['set-commit', '-d']))